Got me curious, mainly because a few years ago I was looking at VR software after my father had a stroke, and we weren't sure how much recovery of his motor skills he would have. (Thankfully, he's had a nearly 100% recovery and it wasn't needed in his case.)
Anyway, I poked around a bit and came across this site, which might prove of some use to you: http://voicecode.iit.nrc.ca/VoiceCode/public/ywiki.cgi